No Flame, Running, Auto Reset, High Limit

Lochinvar 502 - 2072, 402 - 2072 service manual No Flame, Running, Auto Reset, High Limit

Page 37

Copper-fin II/IIE Boiler, Water Heater and Pool Service Manual

3 Troubleshooting (continued)

Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface

FAULT	DESCRIPTION	CORRECTIVE ACTION

	The unit was running and lost the flame signal.	• Inspect igniter and associated wiring for damage and
		connection. Reference page 25 of this manual for
		removal and cleaning procedure. Replace if
		necessary.
		• Check for proper electrical grounding of unit.
		• Check incoming supply gas pressure. Refer to the
No Flame		Gas Connections Section of the Installation and
No Flame		Operation Manual for detailed information concerning
Running		the gas supply.
(Will require a manual		• Verify that	the	tube from	the gas valve	to	the
reset once the condition		• Verify that	the	tube from	the gas valve	to	the
reset once the condition		combustion	air	chamber is	connected and	is	not
has been corrected. Press		combustion	air	chamber is	connected and	is	not
has been corrected. Press		damaged.
the RESET button on the		damaged.
the RESET button on the
SMART SYSTEM display		• Verify that the vent/air intake pipes are installed
to reset.)		correctly and there are no obstructions.
		• Refer to the Checking Manifold Gas Pressure and
		Combustion Analysis Procedure on pages 27 and 28
		of this manual for the proper settings.
		• Inspect the burners. Reference pages 26 and 27
		of this manual for removal and cleaning procedures.
		Replace if necessary.
		• Replace the main control board.

	The outlet water temperature has exceeded the	• Verify that the system is full of water and that all air
	setting of the automatic reset high limit.	has been properly purged from the system.
		• Verify that the appliance is piped properly into the
		heating system. Refer to the Water Connections
		Section of the Installation and Operation Manual for
		the proper piping methods for the Copper-fin.
		• Check 120 VAC to boiler pump motor on a call for
		heat. If voltage is not present, check wiring back
		to the main control board. Replace the main
		control board if necessary.
Auto Reset		• If 120 VAC is present on a call for heat and the
High Limit		pump is not operating, replace the pump.
		• If the system pump is a variable speed pump,
		ensure that the system flow is not less than the
		boiler flow.
		• Check temperature setting of the main control
		board.
		• Check resistance of water sensors and compare to
		Table 3B on page 33 of this manual. Replace
		sensor if necessary.
		• Replace outlet sensor.

Image 37

Contents

Copper-fin II/IIE Boiler, Water Heater Pool Heater Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid Service What is in this manual?Maintenance TroubleshootingCopper-fin display ServiceControl inputs Control outputs How the appliance operates General OperationHow the control module operates Sequence of operationOUT 123.8F129 Sequence of operationHTR Postpurge Display panel menu access Display panel parameter access Parameter table Datalogging Functions Settingsdhw ResetoutdoorAnti-cycle Delay Yes Viewable and changeable control parameters Temperature settings boiler onlyFunctions Data loggingDHW settings Outdoor air reset boiler only Anti-cycling Control modes Cascade Building Management System BMSCirculation pumps Service NotificationService technician Maintenance Maintenance and annual startupOwner maintenance See the User’s Information Manual for instructionsMaintenance Inspect/replace hot surface igniters Check relief valve Inspect/replace hot surface igniterCheck control settings Check all wiringInspect and clean burner Perform start-up and checksChecking combustion air pressure Access to the burner will require the following stepsChecking manifold gas pressure Adjusting combustion air pressureValve Fitting Control Knob Review with owner Inspect and clean the heat exchangerOiled bearing circulators Before troubleshooting TroubleshootingCheck control module fuses Check the followingNo Burner No DisplayOperation Unit Does Not Resistance Temperature Checking temperature sensors Temperature Resistance No Pump NoisyBoiler Pump System Pump DHW PumpFlame Sequence Flow SwitchAnti-cycling No Flame Ign ErrorHSI Current Low Flame CKTNo Flame Auto ResetRunning High LimitInlet Low Manual ResetSensor Open Sensor ShortedTank Open Louver ProvingAPS Open APS ClosedRem Ctrl Flt Temp O/ShootParameters Service BlkProgr Low VoltageNo Error Stored Watch Dog ErrorWrite EEProm Program EEProm

Related manuals

Lochinvar 502 - 2072, 402 - 2072 service manual No Flame, Running, Auto Reset, High Limit

3 Troubleshooting (continued)

FAULT

No Flame

Running

Auto Reset

High Limit